Inoculation of corn high moisture silages, in different processing

Abstract

Two experiments were run to evaluate the pattern of fermentation, the chemical composition and in vitro digestibility of dry matter (IVDDM) of high moisture corn grain silages, with or without microbial inoculation, in different processing. Experiment 1 dealt with inoculation of high moisture corn triturated grain silages, in completely randomized experimental design. Experiment 2 dealt with inoculation of high moisture corn triturated and laminated grain silages, in completely randomized experimental design, in 2 x 2 factorial arrangement. The material was ensiled in experimental silos of PVC (50cm length and 100mm diameter). Samples were taken before and after ensilage. In the experiment 1, the IVDDM of inoculated silages was major than control silages, with averages of 80.67 and 79.80%, for inoculated and control silages, respectively. pH and NH3-N (% total N) and DM losses were not influenced by inoculation, with 3.91, 1.19% total N and 1.18% DM, respectively. In the experiment 2, there was not influence by inoculation and processing on IVDDM, mean of 74.59%. pH and NH3-N were influenced by inoculation, 3.89 vs 3.94 and 0.63 vs 0.72% total N, by inoculated and control silages, respectively. The microbial inoculation of high moisture corn grain does not promote alterations either in the fermentative pattern, chemical composition or in the DM losses in corn high moisture silages, independent of processing. There was an improvement of 1.09% in IVDMD of high moisture corn silages inoculated.